Yong-Hyun Park
2nd-year Ph.D. student at UPenn CIS · park19@seas.upenn.edu
I am Yong-Hyun Park (call me Yong), a second-year Ph.D. student in CIS at UPenn, fortunate to be advised by Jiatao Gu. I am currently a part-time research intern at Roblox.
Previously, I was a research intern at Sony AI and NAVER AI. I earned my B.S. and M.S. in Physics Education from SNU, where I was fortunate to be advised by Junghyo Jo.
Research interests
I work on visual world models that can understand world dynamics and continually adapt based on test-time observations.
Previously, I studied diffusion models from several perspectives: latent space, parameter space, data space, and theory.
news
| Jul 14, 2026 | I started a part-time research internship at Roblox, mentored by Guande He. |
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| Feb 06, 2026 | Our paper “Concept-TRAK: Understanding how diffusion models learn concepts through concept attribution” has been accepted at ICLR 2026! (Mentor: Chieh-Hsin (Jesse) Lai) |
| Mar 11, 2025 | Our paper “Jump Your Steps: Optimizing Sampling Schedule of Discrete Diffusion Models” has been accepted at ICLR 2025! (Mentor: Chieh-Hsin (Jesse) Lai) |
| Jan 22, 2025 | I will be joining UPenn CIS as a Ph.D. student starting Fall 2025, advised by Prof. Jiatao Gu. |
selected publications
- Concept-TRAK: Understanding how diffusion models learn concepts through concept attributionIn The Fourteenth International Conference on Learning Representations, 2026
- Jump Your Steps: Optimizing Sampling Schedule of Discrete Diffusion ModelsIn The Thirteenth International Conference on Learning Representations, 2025
- Understanding the Latent Space of Diffusion Models through the Lens of Riemannian GeometryIn Advances in Neural Information Processing Systems, 2023